Only one out of ten people..

题目

Only one out of ten people..
Only one out of ten people___to handle the work at hand in the office properly,the rest will be assigned some simpler work
A has trained
B have trained
C have been trained
D are to be trained

答案

从the rest will be assigned some simpler work 中 will be 知道是将来时,而非过去完成时